Machine for casting lead seals and the like.



N. S. FRIDERIGHSEN. MACHINE FOR CASTING LEAD SEALS AND THE LIKE. APPLICATION FILED SEPTA, 1908.

Patented Mar. 2, 1909.

2 SHEETS-SHEET l.

THE N mus PETERS can, wasnmar N, D. c.

N. s. FRIDERIC HSEN. MACHINE FOR CASTING LEAD SEALS AND THE LIKE.

vAPIE'LIOATION FILED SEPT. 4, 1908.

Patented Mar. 2, 1909.

2 SHEETS-SHEET 2.

NIELS SOHIERN FRIDEBIGHSEN, OF COPENHAGEN, DENMARK.

MACHINE FOR CASTING LEAD SEALS AND THE LIKE.

Specification of Letters Patent.

Patented March 2, 1909.

Application filed September a, 1908. Serial No. 451,716.

T 0 all whom it may concern:

Be it known that I, Nuns Seaman FRID- ERIOHSEN, mechanical engineer, a subject of Denmark, residing at No. 4 1 Vester Folledvej, Copenhagen, in the Kingdom of Denmark, have invented new and useful Im rovements in Machines for Casting Lead Sea s and the Like, of which the following is a specification.

The invention has for its object a machine for casting lead seals and the like and consists in the fact that the casting molds for the seals together with their cores are arranged in a disk rotatable between two sta tionary disks, this rotatable disk during its rotation receives the lead and automatically cuts off the supply, the seals being ejected from the molds after they have sufficiently cooled.

A constructional form of the invention is illustrated in the accompanying drawing, in which- Figure 1 shows the machine in elevation and partial section. Fig. 2 shows the upper disk viewed from below, Figs. 3 and 4 are plan views of the middle and the lower disk respectively. Fig. 5 is a front view of the knock-out wheel, Figs. 6 and 7 illustrate a core in plan and in elevation respectively, on a larger scale, and Fig. 8 a modified con structional form of Fig. 3.

The base disk 1 is provided with a bearing 2 for the vertical shaft 3, a hopper 4 for the reception of the finished seals, and uprights 5 carrying the stationary disks 6 and 7 between which the rotatable disk 8 mounted on the shaft 3 is situated. The lower disk 6 is provided with a hole 9 for the shaft 3 and an opening 10 through which the seals are ejected, while the upper disk 7 carries a bearing for the shaft 3, a hole 11 for the knock-out device, a hole 12 for the access of the lead to the mold and an eccentric channel 13 for the guidance of the pins 15 on the cores 14.

The shaft 3 carries a pulley 16 and a bevel pinion 17, which meshes with the bevel pinion 18 on the shaft 19; this latter being mounted in a bearing on the disk 7. The shaft 19 carries the knock-out device, which is here shown as a wheel 20 with teeth or rongs 21 for ejecting the seals from the mo ds, but which may present any other convenient form.

The rotatable disk 8 comprises a series of molds 22 and opposite each of them a radial bearing 23 for a core 1 1; in Fig. 3 only a few of these cores are shown.

A water tank 24 is arranged on the disk 7 and either extends around its entire periphery or if desired only over a portion of the same cooling water is supphed to this tank, referably on the counter-current rincip e.

The lead is melted in a tank 25 by means of gas jets 26; from this tank it flows through a pipe 27, likewise heated by gas jets 26, to the molds. The tank 25 is located at such a height above the molds that the necessary pressure is imparted to the lead for forcing it into the molds.

The operation of the machine may be as follows :If the disk 8 is rotated in the direc tion indicated by the arrow 28 in Fig. 3, the pins 15 of the core will bring the core into the molds 22 and out again, owing to their engagement in the eccentric channel 13. When the molds are located exactly beneath the supply pipe 27 (left hand side of Fig. 3) the cores are raised to their fullest extent; then as they approach the ejection place (right hand side of Fig. 3), the cores are gradually drawn out of the molds, so that at last they are entirely removed from the cooled seals which are ejected by the knock-out wheel 20 and fall into the hopper 4.

In some cases especially when thicker lead seals are to be molded, it may be advantageous to retard the withdrawal of the cores. For this purpose I make one half of the channel 13 concentric with the disk and only the other half eccentric to the same, as shown in Fig. 8. The seals hereby get sufficient time to cool down before the cores are withdrawn.

If it be desired to produce seals of a different size, it is only necessary to replace the disk 8 by another; if it is also desired to ob tain thinner seals, a thinner disk 8 is used, in which case a correspondingly thicker disk 6 must be used.

A machine of the kind described above and comprising a disk 8 say 40 cm. in diameter, will cast 30,000 seals in an hour, that is to say thirty times more than any machine hitherto constructed.

Having now particularly ascertained and described the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is 1. In a machine for casting lead seals or the like, receiving the molten lead from a furnace, two stationary disks, a rotating disk between the same, and provided with molds, a sliding core in each mold and a knock-out device.

2. In a machine for casting lead seals or the like, receiving the molten lead from a furnace, two stationary disks, one of the disks being provided with an eccentric or partially eccentric channel, a rotating disk between the same and provided with molds, a sliding core in each mold, each core being provided with a pin engaging the said eccentric or par tially eccentric channel, and a knock-out device.

3. In a machine for casting lead seals or the like, receiving the molten lead from a furnace, two stationary disks, a rotating disk between the same and provided with molds,

a sliding core in each mold and a knock-out 20 wheel with teeth or prongs.

4. In a machine for casting lead seals or the like, receiving the molten lead from a furnace, two stationary disks, one of which is provided with an eccentric or partially eccentric channel, a rotating disk between the same and provided with molds, a sliding core in each mold, each core being provided with a pin engaging the said eccentric or partially eccentric channel, and a knock-out wheel with teeth or prongs.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

NIELS SCHIERN FRIDERICHSEN.

Witnesses 1-1.0. SoHinRN,

MARoUs MoELER. 

